documents

notes:

A difussive roof underlay of the highest
quality, three-layered, weight 230 g/m2
and thickness of 900 μm. It represents
very high mechanical resistance and
water vapour permeability (Sd = 0,04
m). It can be used both directly on thermal
insulation or laid on a full boarding.
It is used for various types of roofing:
shingles, concrete and ceramic tiles,
metal sheets, sheet metal tiles.
mdm® Ventia Q underlay is
a premium class product!

Use with full boardnig

YES

UV resistance*
concerns average yearly radiation in the Central European climate